Thread: prop size
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Old 03-23-2006, 05:50 PM
birdhook birdhook is offline
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Join Date: Feb 2006
Location: Maryland
Posts: 16
Default prop size
What's the correct prop size for my 1971 CC 140hp I/O mercruiser? I've had a 21 pitch alum 3 blade Michigan prop on it and have been told a 19 pitch might be better. I have a feeling the motor is working to hard for the 21 and the motor wants to stall at a very low troll speed. Gets up on plane O.K. I forget what top speed and rpm's readings are but they seem pretty good. Thanks, Keith
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WildWill 1971 20 Center Console
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